25505201 has 4 divisors (see below), whose sum is σ = 26847600. Its totient is φ = 24162804.

The previous prime is 25505191. The next prime is 25505209. The reversal of 25505201 is 10250552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25505201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25505209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671171 + ... + 671208.

It is an arithmetic number, because the mean of its divisors is an integer number (6711900).

Almost surely, 2^25505201 is an apocalyptic number.

It is an amenable number.

25505201 is a deficient number, since it is larger than the sum of its proper divisors (1342399).

25505201 is a wasteful number, since it uses less digits than its factorization.

25505201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342398.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 25505201 is about 5050.2674186621. The cubic root of 25505201 is about 294.3582756383.

Adding to 25505201 its reverse (10250552), we get a palindrome (35755753).

The spelling of 25505201 in words is "twenty-five million, five hundred five thousand, two hundred one".